Stock-Based Compensation (Narrative) (Details) - $ / shares	3 Months Ended				6 Months Ended
	Jun. 30, 2023	Mar. 31, 2023	Jun. 30, 2022	Mar. 31, 2022	Jun. 30, 2023	Jun. 30, 2022
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Performance period specified in grant, in years					3 years
Granted	17,054	222,782	4,736	57,052
2004 Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares available for issuance	0				0
Amended and Restated Equity Compensation Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares authorized for issuance	6,250,000				6,250,000
Maximum number of shares may be issued pursuant to stock awards, stock units and other stock-based awards					3,125,000
Maximum number of shares subject to grants to any one individual in any one year					500,000
Shares available for issuance	1,506,793				1,506,793
Performance Share Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period, in years					3 years
Granted					161,981
Weighted average fair value of stock awards granted					$ 45.06	$ 42.31
Amortization period of fair value of shares, in months					36 months
Performance Share Units [Member] | Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of target award amount the grantee may earn					0.00%
Performance Share Units [Member] | Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of target award amount the grantee may earn					200.00%
Restricted Stock Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted period					3 years
Granted					73,696
Weighted average fair value of stock awards granted					$ 45.61	$ 45.10
Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted, Shares					74,632
Vesting period, start, in years					1 year
Vesting period, in years					10 years
Stock Options [Member] | Share-based Payment Arrangement, Tranche One [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting percentage					33.00%
Stock Options [Member] | Share-based Payment Arrangement, Tranche Two [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting percentage					33.00%
Stock Options [Member] | Share-based Payment Arrangement, Tranche Three [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting percentage					33.00%
Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted					0	0
Weighted average fair value of stock awards granted					$ 0
Stock Awards [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted					18,676
Weighted average fair value of stock awards granted					$ 41.78	$ 46.66